using namespace std;
class Rational
{
private:
       int numitor;
       int numarator;
public:
       Rational(int numitor, int numarator);
       Rational();
int getNumarator();
int getNumitor();
void setNumarator(int numarator);
void setNumitor(int numitor);

friend Rational& operator + ( Rational a, Rational b);
friend Rational& operator - ( Rational a, Rational b); 
friend Rational& operator * ( Rational a, Rational b); 
friend Rational& operator / ( Rational a, Rational b);       
};
